Typhoon NAKRI is passing in the south of Izu Islands. It has already weakened, but the rough sea will continue for a while. Typhoons formed in May showed almost the same tracks to pass the south of Izu Islands (typhoon tracks of this year), and this is not because of coincidence but because the edge of Subtropical High (Pacific High) has been stationary around here.

Typhoon NAKRI is intensifying rapidly, and May of this season has seen especially intense typhoon activity. Firstly, the number of typhoons formed this May reached 4 (which can be obtained from Search by Month for the Birth of the Typhoon (Western North Pacific)), which is the record-tying number in history, only equal to 1971 and 1980. Secondly, Typhoon RAMMASUN has already recorded the central pressure of 915hPa, which is the second strongest central pressure among all typhoons formed in May. This typhoon is also expected to be an intense typhoon comparable to the previous one, which means we might have two typhoons of the strongest intensity as typhoons in May. Typhoon NAKRI is small in size, but it also means that it is more likely to intensify if all conditions are met.

Typhoon NAKRI was formed in east of Philippines. This typhoon is forecast to move northward with intensification for the time being. The tracking chart of this season can be checked at the tracking chart, which is in the "Number of Typhoons" corner at the top right of the top page. This figure indicates that, at this time of this season, many of the typhoons move northeast-ward to east-northeast-ward in south of Honshu Island of Japan to reach the south of Izu Islands or Ogasawara Islands. This typhoon may also move on a similar track to these ones. You may also notice that the pace of typhoon formation is getting more frequent recently, and now the number of typhoons reached 5, which is more than the average number of 2.7. So let us check how rapid the pace of this season is in comparison to that of other seasons using the following method.

1. Click the Average = 2.7 in the "Number of Typhoons" section in the top page.
2. Click "The list of typhoons born before May 27" in the "Accumulative Occurrence of Typhoons" section.
3. The list of typhoons is displayed, so scroll down to click "View the histogram for the year of birth" in the "Next Operation" section.
4. The histogram is displayed, so click the "Frequency" at the top row of the table to order by frequency.

The procedure reveals that, at the time of May 27 since 1951, the largest number was 8 in 1971, and 6 in 1976 and 1965, and 5 in 2008 and other years follows as the fourth rank. The annual pace of typhoon formation cannot be predicted from these numbers, but it seems we can say that the pace of formation is relatively more rapid than normal.